diff --git a/rust/agents/relayer/src/settings/matching_list.rs b/rust/agents/relayer/src/settings/matching_list.rs
index b153a1325..3aded7faf 100644
--- a/rust/agents/relayer/src/settings/matching_list.rs
+++ b/rust/agents/relayer/src/settings/matching_list.rs
@@ -1,5 +1,5 @@
 use std::fmt;
-use std::fmt::{Display, Formatter};
+use std::fmt::{Debug, Display, Formatter};
 use std::marker::PhantomData;
 use std::num::ParseIntError;
 
@@ -41,15 +41,15 @@ impl<T: PartialEq> Filter<T> {
     }
 }
 
-impl<T: Display> Display for Filter<T> {
+impl<T: Debug> Display for Filter<T> {
     fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
         match self {
             Self::Wildcard => write!(f, "*"),
-            Self::Enumerated(l) if l.len() == 1 => write!(f, "{}", l[0]),
+            Self::Enumerated(l) if l.len() == 1 => write!(f, "{:?}", l[0]),
             Self::Enumerated(l) => {
                 write!(f, "[")?;
                 for i in l {
-                    write!(f, "{i},")?;
+                    write!(f, "{i:?},")?;
                 }
                 write!(f, "]")
             }
@@ -276,9 +276,10 @@ fn parse_addr<E: Error>(addr_str: &str) -> Result<H256, E> {
 
 #[cfg(test)]
 mod test {
-    use crate::settings::matching_list::MatchInfo;
     use hyperlane_core::{H160, H256};
 
+    use crate::settings::matching_list::MatchInfo;
+
     use super::{Filter::*, MatchingList};
 
     #[test]
diff --git a/rust/hyperlane-base/src/settings/loader.rs b/rust/hyperlane-base/src/settings/loader.rs
index c25155468..c29754a66 100644
--- a/rust/hyperlane-base/src/settings/loader.rs
+++ b/rust/hyperlane-base/src/settings/loader.rs
@@ -73,12 +73,12 @@ pub(crate) fn load_settings_object<'de, T: Deserialize<'de>, S: AsRef<str>>(
                 .source(Some(filtered_env)),
         )
         .build()?;
-    let formatted_config = format!("{:#?}", config_deserializer);
+    let formatted_config = format!("{:#?}", config_deserializer).replace('\n', "\\n");
     match serde_path_to_error::deserialize(config_deserializer) {
         Ok(cfg) => Ok(cfg),
         Err(err) => {
             println!(
-                "Error during deseriaization, showing the config for debugging:\n {}",
+                "Error during deserialization, showing the config for debugging: {}",
                 formatted_config
             );
             let ctx = format!("Invalid config at `{}` {:?}", err.path(), err);
diff --git a/typescript/infra/config/environments/mainnet2/agent.ts b/typescript/infra/config/environments/mainnet2/agent.ts
index 3776dbce0..ec4e617de 100644
--- a/typescript/infra/config/environments/mainnet2/agent.ts
+++ b/typescript/infra/config/environments/mainnet2/agent.ts
@@ -1,15 +1,21 @@
-import { ALL_KEY_ROLES } from '../../../src/agents/roles';
+import { ALL_KEY_ROLES, KEY_ROLE_ENUM } from '../../../src/agents/roles';
 import { AgentConfig } from '../../../src/config';
 import {
   ConnectionType,
   GasPaymentEnforcementPolicyType,
 } from '../../../src/config/agent';
 import { Contexts } from '../../contexts';
+import { helloworldMatchingList } from '../../utils';
 
 import { MainnetChains, chainNames, environment } from './chains';
-// import { helloWorld } from './helloworld';
+import { helloWorld } from './helloworld';
 import { validators } from './validators';
 
+const releaseCandidateHelloworldMatchingList = helloworldMatchingList(
+  helloWorld,
+  Contexts.ReleaseCandidate,
+);
+
 export const hyperlane: AgentConfig<MainnetChains> = {
   environment,
   namespace: environment,
@@ -67,6 +73,7 @@ export const hyperlane: AgentConfig<MainnetChains> = {
   relayer: {
     default: {
       blacklist: [
+        ...releaseCandidateHelloworldMatchingList,
         {
           originDomain: '137',
           recipientAddress: '0xBC3cFeca7Df5A45d61BC60E7898E63670e1654aE',
@@ -80,6 +87,37 @@ export const hyperlane: AgentConfig<MainnetChains> = {
   rolesWithKeys: ALL_KEY_ROLES,
 };
 
+export const releaseCandidate: AgentConfig<MainnetChains> = {
+  environment,
+  namespace: environment,
+  runEnv: environment,
+  context: Contexts.ReleaseCandidate,
+  docker: {
+    repo: 'gcr.io/abacus-labs-dev/hyperlane-agent',
+    tag: 'sha-0477ee1',
+  },
+  aws: {
+    region: 'us-east-1',
+  },
+  environmentChainNames: chainNames,
+  contextChainNames: chainNames,
+  validatorSets: validators,
+  gelato: {
+    enabledChains: [],
+  },
+  connectionType: ConnectionType.HttpQuorum,
+  relayer: {
+    default: {
+      whitelist: releaseCandidateHelloworldMatchingList,
+      gasPaymentEnforcementPolicy: {
+        type: GasPaymentEnforcementPolicyType.None,
+      },
+    },
+  },
+  rolesWithKeys: [KEY_ROLE_ENUM.Relayer, KEY_ROLE_ENUM.Kathy],
+};
+
 export const agents = {
   [Contexts.Hyperlane]: hyperlane,
+  [Contexts.ReleaseCandidate]: releaseCandidate,
 };
diff --git a/typescript/infra/config/environments/mainnet2/funding.ts b/typescript/infra/config/environments/mainnet2/funding.ts
index cdd5c76d6..72c417fa1 100644
--- a/typescript/infra/config/environments/mainnet2/funding.ts
+++ b/typescript/infra/config/environments/mainnet2/funding.ts
@@ -21,6 +21,7 @@ export const keyFunderConfig: KeyFunderConfig = {
   contextFundingFrom: Contexts.Hyperlane,
   contextsAndRolesToFund: {
     [Contexts.Hyperlane]: [KEY_ROLE_ENUM.Relayer, KEY_ROLE_ENUM.Kathy],
+    [Contexts.ReleaseCandidate]: [KEY_ROLE_ENUM.Relayer, KEY_ROLE_ENUM.Kathy],
   },
   connectionType: ConnectionType.Http,
 };
diff --git a/typescript/infra/config/environments/mainnet2/helloworld.ts b/typescript/infra/config/environments/mainnet2/helloworld.ts
index e110a19df..b452f0699 100644
--- a/typescript/infra/config/environments/mainnet2/helloworld.ts
+++ b/typescript/infra/config/environments/mainnet2/helloworld.ts
@@ -5,6 +5,7 @@ import { Contexts } from '../../contexts';
 
 import { MainnetChains, environment } from './chains';
 import hyperlaneAddresses from './helloworld/hyperlane/addresses.json';
+import rcAddresses from './helloworld/rc/addresses.json';
 
 export const hyperlane: HelloWorldConfig<MainnetChains> = {
   addresses: hyperlaneAddresses,
@@ -28,8 +29,28 @@ export const hyperlane: HelloWorldConfig<MainnetChains> = {
   },
 };
 
+export const releaseCandidate: HelloWorldConfig<MainnetChains> = {
+  addresses: rcAddresses,
+  kathy: {
+    docker: {
+      repo: 'gcr.io/abacus-labs-dev/hyperlane-monorepo',
+      tag: 'sha-0477ee1',
+    },
+    chainsToSkip: [],
+    runEnv: environment,
+    namespace: environment,
+    runConfig: {
+      mode: HelloWorldKathyRunMode.CycleOnce,
+    },
+    messageSendTimeout: 1000 * 60 * 8, // 8 min
+    messageReceiptTimeout: 1000 * 60 * 20, // 20 min
+    connectionType: ConnectionType.Http,
+  },
+};
+
 export const helloWorld: Partial<
   Record<Contexts, HelloWorldConfig<MainnetChains>>
 > = {
   [Contexts.Hyperlane]: hyperlane,
+  [Contexts.ReleaseCandidate]: releaseCandidate,
 };
diff --git a/typescript/infra/config/environments/mainnet2/helloworld/rc/addresses.json b/typescript/infra/config/environments/mainnet2/helloworld/rc/addresses.json
new file mode 100644
index 000000000..d7e6de8d9
--- /dev/null
+++ b/typescript/infra/config/environments/mainnet2/helloworld/rc/addresses.json
@@ -0,0 +1,29 @@
+{
+  "bsc": {
+    "router": "0x3f4663873A9aC7Ec683a5Bddc0acbC00091c10D0"
+  },
+  "avalanche": {
+    "router": "0xaC5a4925d8aab7B9fb33F0a1722e3b94b6f87dB4"
+  },
+  "polygon": {
+    "router": "0x3Ee06Da5110117c5B9AD41e2F827B774cBb15CC3"
+  },
+  "celo": {
+    "router": "0x8E10405F4D23060b1a75005EFB99d99D537e0A7f"
+  },
+  "arbitrum": {
+    "router": "0xb44a2B834FFdf762051Ee26Eb41531a4A02fA8d0"
+  },
+  "optimism": {
+    "router": "0xe5F7E241F9bb6A644e88f2ca38fC373196b5392b"
+  },
+  "ethereum": {
+    "router": "0x43ae568363c4FA6897EE9dF0c9ca445d3872c906"
+  },
+  "moonbeam": {
+    "router": "0x1Efd1EdC42ef6cf2612F75e6C599C081d650c513"
+  },
+  "gnosis": {
+    "router": "0x14aBb1f28B06272c57c37723D0e671d1c3326679"
+  }
+}
diff --git a/typescript/infra/config/environments/mainnet2/helloworld/rc/verification.json b/typescript/infra/config/environments/mainnet2/helloworld/rc/verification.json
new file mode 100644
index 000000000..343c3762b
--- /dev/null
+++ b/typescript/infra/config/environments/mainnet2/helloworld/rc/verification.json
@@ -0,0 +1,74 @@
+{
+  "bsc": [
+    {
+      "name": "router",
+      "address": "0x3f4663873A9aC7Ec683a5Bddc0acbC00091c10D0",
+      "constructorArguments": "00000000000000000000000035231d4c2d8b8adcb5617a638a0c4548684c7c7000000000000000000000000056f52c0a1ddcd557285f7cbc782d3d83096ce1cc",
+      "isProxy": false
+    }
+  ],
+  "avalanche": [
+    {
+      "name": "router",
+      "address": "0xaC5a4925d8aab7B9fb33F0a1722e3b94b6f87dB4",
+      "constructorArguments": "00000000000000000000000035231d4c2d8b8adcb5617a638a0c4548684c7c7000000000000000000000000056f52c0a1ddcd557285f7cbc782d3d83096ce1cc",
+      "isProxy": false
+    }
+  ],
+  "polygon": [
+    {
+      "name": "router",
+      "address": "0x3Ee06Da5110117c5B9AD41e2F827B774cBb15CC3",
+      "constructorArguments": "00000000000000000000000035231d4c2d8b8adcb5617a638a0c4548684c7c7000000000000000000000000056f52c0a1ddcd557285f7cbc782d3d83096ce1cc",
+      "isProxy": false
+    }
+  ],
+  "celo": [
+    {
+      "name": "router",
+      "address": "0x8E10405F4D23060b1a75005EFB99d99D537e0A7f",
+      "constructorArguments": "00000000000000000000000035231d4c2d8b8adcb5617a638a0c4548684c7c7000000000000000000000000056f52c0a1ddcd557285f7cbc782d3d83096ce1cc",
+      "isProxy": false
+    }
+  ],
+  "arbitrum": [
+    {
+      "name": "router",
+      "address": "0xb44a2B834FFdf762051Ee26Eb41531a4A02fA8d0",
+      "constructorArguments": "00000000000000000000000035231d4c2d8b8adcb5617a638a0c4548684c7c7000000000000000000000000056f52c0a1ddcd557285f7cbc782d3d83096ce1cc",
+      "isProxy": false
+    }
+  ],
+  "optimism": [
+    {
+      "name": "router",
+      "address": "0xe5F7E241F9bb6A644e88f2ca38fC373196b5392b",
+      "constructorArguments": "00000000000000000000000035231d4c2d8b8adcb5617a638a0c4548684c7c7000000000000000000000000056f52c0a1ddcd557285f7cbc782d3d83096ce1cc",
+      "isProxy": false
+    }
+  ],
+  "ethereum": [
+    {
+      "name": "router",
+      "address": "0x43ae568363c4FA6897EE9dF0c9ca445d3872c906",
+      "constructorArguments": "00000000000000000000000035231d4c2d8b8adcb5617a638a0c4548684c7c7000000000000000000000000056f52c0a1ddcd557285f7cbc782d3d83096ce1cc",
+      "isProxy": false
+    }
+  ],
+  "moonbeam": [
+    {
+      "name": "router",
+      "address": "0x1Efd1EdC42ef6cf2612F75e6C599C081d650c513",
+      "constructorArguments": "00000000000000000000000035231d4c2d8b8adcb5617a638a0c4548684c7c7000000000000000000000000056f52c0a1ddcd557285f7cbc782d3d83096ce1cc",
+      "isProxy": false
+    }
+  ],
+  "gnosis": [
+    {
+      "name": "router",
+      "address": "0x14aBb1f28B06272c57c37723D0e671d1c3326679",
+      "constructorArguments": "00000000000000000000000035231d4c2d8b8adcb5617a638a0c4548684c7c7000000000000000000000000056f52c0a1ddcd557285f7cbc782d3d83096ce1cc",
+      "isProxy": false
+    }
+  ]
+}
diff --git a/typescript/infra/config/environments/testnet3/agent.ts b/typescript/infra/config/environments/testnet3/agent.ts
index 0b09704e9..e161eaf9b 100644
--- a/typescript/infra/config/environments/testnet3/agent.ts
+++ b/typescript/infra/config/environments/testnet3/agent.ts
@@ -1,23 +1,22 @@
 import { chainMetadata } from '@hyperlane-xyz/sdk';
 
-import { ALL_KEY_ROLES } from '../../../src/agents/roles';
+import { ALL_KEY_ROLES, KEY_ROLE_ENUM } from '../../../src/agents/roles';
 import { AgentConfig } from '../../../src/config';
 import {
   ConnectionType,
   GasPaymentEnforcementPolicyType,
 } from '../../../src/config/agent';
 import { Contexts } from '../../contexts';
+import { helloworldMatchingList } from '../../utils';
 
 import { TestnetChains, chainNames, environment } from './chains';
-// import { helloWorld } from './helloworld';
+import { helloWorld } from './helloworld';
 import { validators } from './validators';
 
-/*
 const releaseCandidateHelloworldMatchingList = helloworldMatchingList(
   helloWorld,
   Contexts.ReleaseCandidate,
 );
-*/
 
 export const hyperlane: AgentConfig<TestnetChains> = {
   environment,
@@ -26,7 +25,7 @@ export const hyperlane: AgentConfig<TestnetChains> = {
   context: Contexts.Hyperlane,
   docker: {
     repo: 'gcr.io/abacus-labs-dev/hyperlane-agent',
-    tag: 'sha-c163fce',
+    tag: 'sha-0477ee1',
   },
   aws: {
     region: 'us-east-1',
@@ -67,6 +66,7 @@ export const hyperlane: AgentConfig<TestnetChains> = {
   relayer: {
     default: {
       blacklist: [
+        ...releaseCandidateHelloworldMatchingList,
         { recipientAddress: '0xBC3cFeca7Df5A45d61BC60E7898E63670e1654aE' },
       ],
       gasPaymentEnforcementPolicy: {
@@ -77,6 +77,37 @@ export const hyperlane: AgentConfig<TestnetChains> = {
   rolesWithKeys: ALL_KEY_ROLES,
 };
 
+export const releaseCandidate: AgentConfig<TestnetChains> = {
+  environment,
+  namespace: environment,
+  runEnv: environment,
+  context: Contexts.ReleaseCandidate,
+  docker: {
+    repo: 'gcr.io/abacus-labs-dev/hyperlane-agent',
+    tag: 'sha-0477ee1',
+  },
+  aws: {
+    region: 'us-east-1',
+  },
+  environmentChainNames: chainNames,
+  contextChainNames: chainNames,
+  validatorSets: validators,
+  gelato: {
+    enabledChains: [],
+  },
+  connectionType: ConnectionType.HttpQuorum,
+  relayer: {
+    default: {
+      whitelist: releaseCandidateHelloworldMatchingList,
+      gasPaymentEnforcementPolicy: {
+        type: GasPaymentEnforcementPolicyType.None,
+      },
+    },
+  },
+  rolesWithKeys: [KEY_ROLE_ENUM.Relayer, KEY_ROLE_ENUM.Kathy],
+};
+
 export const agents = {
   [Contexts.Hyperlane]: hyperlane,
+  [Contexts.ReleaseCandidate]: releaseCandidate,
 };
diff --git a/typescript/infra/config/environments/testnet3/funding.ts b/typescript/infra/config/environments/testnet3/funding.ts
index 18c82a297..979d28857 100644
--- a/typescript/infra/config/environments/testnet3/funding.ts
+++ b/typescript/infra/config/environments/testnet3/funding.ts
@@ -20,6 +20,7 @@ export const keyFunderConfig: KeyFunderConfig = {
   contextFundingFrom: Contexts.Hyperlane,
   contextsAndRolesToFund: {
     [Contexts.Hyperlane]: [KEY_ROLE_ENUM.Relayer, KEY_ROLE_ENUM.Kathy],
+    [Contexts.ReleaseCandidate]: [KEY_ROLE_ENUM.Relayer, KEY_ROLE_ENUM.Kathy],
   },
   connectionType: ConnectionType.Http,
 };
diff --git a/typescript/infra/config/environments/testnet3/helloworld.ts b/typescript/infra/config/environments/testnet3/helloworld.ts
index 4dd88a589..b059672a6 100644
--- a/typescript/infra/config/environments/testnet3/helloworld.ts
+++ b/typescript/infra/config/environments/testnet3/helloworld.ts
@@ -5,6 +5,7 @@ import { Contexts } from '../../contexts';
 
 import { TestnetChains, environment } from './chains';
 import hyperlaneAddresses from './helloworld/hyperlane/addresses.json';
+import rcAddresses from './helloworld/rc/addresses.json';
 
 export const hyperlane: HelloWorldConfig<TestnetChains> = {
   addresses: hyperlaneAddresses,
@@ -26,8 +27,28 @@ export const hyperlane: HelloWorldConfig<TestnetChains> = {
   },
 };
 
+export const releaseCandidate: HelloWorldConfig<TestnetChains> = {
+  addresses: rcAddresses,
+  kathy: {
+    docker: {
+      repo: 'gcr.io/abacus-labs-dev/hyperlane-monorepo',
+      tag: 'sha-0477ee1',
+    },
+    chainsToSkip: [],
+    runEnv: environment,
+    namespace: environment,
+    runConfig: {
+      mode: HelloWorldKathyRunMode.CycleOnce,
+    },
+    messageSendTimeout: 1000 * 60 * 8, // 8 min
+    messageReceiptTimeout: 1000 * 60 * 20, // 20 min
+    connectionType: ConnectionType.Http,
+  },
+};
+
 export const helloWorld: Partial<
   Record<Contexts, HelloWorldConfig<TestnetChains>>
 > = {
   [Contexts.Hyperlane]: hyperlane,
+  [Contexts.ReleaseCandidate]: releaseCandidate,
 };
diff --git a/typescript/infra/config/environments/testnet3/helloworld/rc/addresses.json b/typescript/infra/config/environments/testnet3/helloworld/rc/addresses.json
new file mode 100644
index 000000000..edd14046b
--- /dev/null
+++ b/typescript/infra/config/environments/testnet3/helloworld/rc/addresses.json
@@ -0,0 +1,26 @@
+{
+  "alfajores": {
+    "router": "0x908200F276B36dAa2FAfe0757bB7188F36E85d3E"
+  },
+  "fuji": {
+    "router": "0xc91Fcf115926705737394c4560E8b974f28eaad6"
+  },
+  "mumbai": {
+    "router": "0x5B30cF4a552B32FBF9c15b98f91e863D822f355C"
+  },
+  "bsctestnet": {
+    "router": "0x07453BE646Aab789a4AcE31DB68688263fB48D53"
+  },
+  "goerli": {
+    "router": "0x04E9e0B2EC0bB80F9A914d82435DeE7f10ce7D29"
+  },
+  "moonbasealpha": {
+    "router": "0xa5075B2AcA697944273d67B57a3340a0730632A3"
+  },
+  "optimismgoerli": {
+    "router": "0x793A8E343eBc1498afd644A05507fc2b6B97AfB4"
+  },
+  "arbitrumgoerli": {
+    "router": "0xa1E338311C26a00Eb586133728c3C9B97c67fAe0"
+  }
+}
diff --git a/typescript/infra/config/environments/testnet3/helloworld/rc/verification.json b/typescript/infra/config/environments/testnet3/helloworld/rc/verification.json
new file mode 100644
index 000000000..85e7dd895
--- /dev/null
+++ b/typescript/infra/config/environments/testnet3/helloworld/rc/verification.json
@@ -0,0 +1,66 @@
+{
+  "alfajores": [
+    {
+      "name": "router",
+      "address": "0x908200F276B36dAa2FAfe0757bB7188F36E85d3E",
+      "constructorArguments": "000000000000000000000000cc737a94fecaec165abcf12ded095bb13f037685000000000000000000000000f90cb82a76492614d07b82a7658917f3ac811ac1",
+      "isProxy": false
+    }
+  ],
+  "fuji": [
+    {
+      "name": "router",
+      "address": "0xc91Fcf115926705737394c4560E8b974f28eaad6",
+      "constructorArguments": "000000000000000000000000cc737a94fecaec165abcf12ded095bb13f037685000000000000000000000000f90cb82a76492614d07b82a7658917f3ac811ac1",
+      "isProxy": false
+    }
+  ],
+  "mumbai": [
+    {
+      "name": "router",
+      "address": "0x5B30cF4a552B32FBF9c15b98f91e863D822f355C",
+      "constructorArguments": "000000000000000000000000cc737a94fecaec165abcf12ded095bb13f037685000000000000000000000000f90cb82a76492614d07b82a7658917f3ac811ac1",
+      "isProxy": false
+    }
+  ],
+  "bsctestnet": [
+    {
+      "name": "router",
+      "address": "0x07453BE646Aab789a4AcE31DB68688263fB48D53",
+      "constructorArguments": "000000000000000000000000cc737a94fecaec165abcf12ded095bb13f037685000000000000000000000000f90cb82a76492614d07b82a7658917f3ac811ac1",
+      "isProxy": false
+    }
+  ],
+  "goerli": [
+    {
+      "name": "router",
+      "address": "0x04E9e0B2EC0bB80F9A914d82435DeE7f10ce7D29",
+      "constructorArguments": "000000000000000000000000cc737a94fecaec165abcf12ded095bb13f037685000000000000000000000000f90cb82a76492614d07b82a7658917f3ac811ac1",
+      "isProxy": false
+    }
+  ],
+  "moonbasealpha": [
+    {
+      "name": "router",
+      "address": "0xa5075B2AcA697944273d67B57a3340a0730632A3",
+      "constructorArguments": "000000000000000000000000cc737a94fecaec165abcf12ded095bb13f037685000000000000000000000000f90cb82a76492614d07b82a7658917f3ac811ac1",
+      "isProxy": false
+    }
+  ],
+  "optimismgoerli": [
+    {
+      "name": "router",
+      "address": "0x793A8E343eBc1498afd644A05507fc2b6B97AfB4",
+      "constructorArguments": "000000000000000000000000cc737a94fecaec165abcf12ded095bb13f037685000000000000000000000000f90cb82a76492614d07b82a7658917f3ac811ac1",
+      "isProxy": false
+    }
+  ],
+  "arbitrumgoerli": [
+    {
+      "name": "router",
+      "address": "0xa1E338311C26a00Eb586133728c3C9B97c67fAe0",
+      "constructorArguments": "000000000000000000000000cc737a94fecaec165abcf12ded095bb13f037685000000000000000000000000f90cb82a76492614d07b82a7658917f3ac811ac1",
+      "isProxy": false
+    }
+  ]
+}